Revision 44908

This PR and the patch was created during the BSDCan 2014 Doc lounge.

From the PR:
- Describe that it's possible to install prebuilt binaries as well as build
  from source.
- Instructions on how to extract distfiles on 8.x & earlier / 9.0 & later
- Remove reference to jail_www_devfs_ruleset rc.conf, as-is it prevents the
  jail from starting because a ruleset needs to be defined & as there is no
  documentation for that in the article, it's easier to remove it, by doing
  this, the default ruleset is applied.
- Add instructions on how to keep jails up to date with freebsd-update.

I cleaned up the patch a bit, but it is still good work for a first patch.

PR:		docs/189901
Submitted by:	Sevan Janiyan